<PRE><B>Question 98888</B>
Scientific notation is distinct by its usage of exponentials, especially powers of 10.

5000 can be written as {{{5*10^3}}}, {{{10^3}}} = 10*10*10 = 1000, 5*1000=5000
128000 can be expressed as {{{1.28*10^5}}}
30000000 as {{{3*10^7}}}
20 as {{{2*10^1}}}

{{{10^(-1)}}} = {{{1/10}}} = 0.1
{{{10^(-2)}}} = {{{1/100}}} = 0.01
{{{10^(-5)}}} = {{{1/100000}}} = 0.00001

by the way whenever you have negative exponent like {{{x^(-n)}}}, you can write it as {{{1/x^n}}}

and finally number 0.000098 = {{{9.8*10^(-5)}}} 
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